IDTQS3VH251 [IDT]
QUICKSWITCH PRODUCTS 2.5V / 3.3V 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH; 快速切换产品2.5V / 3.3V 8 ： 1复用器/解复用器高带宽总线开关
| 型号： | IDTQS3VH251 |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | QUICKSWITCH PRODUCTS 2.5V / 3.3V 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH |
| 文件： | 总8页 (文件大小：74K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS 2.5V
IDTQS3VH251
/ 3.3V 8:1 MUX/DEMUX HIGH
BANDWIDTH BUS SWITCH
FEATURES:
DESCRIPTION:
• N channel FET switches with no parasitic diode to VCC
– Isolationunderpower-offconditions
– No DC path to VCC or GND
The QS3VH251 HotSwitch Quad 2:1 multiplexer/demultiplexer is a high
bandwidthbusswitch. TheQS3VH251hasverylowONresistance,resulting
in under 250ps propagation delay through the switch. The Select (Sx) input
controlsthedataflow. Themultiplexers/demultiplexersareenabledwhenthe
Enable(E)inputislow. IntheONstate,theswitchescanpasssignalsupto5V.
IntheOFFstate,theswitchesofferveryhighimpedenceattheterminals.
Thecombinationofnear-zeropropagationdelay,highOFFimpedance,and
over-voltage tolerance makes the QS3VH251 ideal for high performance
comminucationapplications.
– 5V tolerant in OFF and ON state
• 5V tolerant I/Os
• Low RON - 4Ω typical
• Flat RON characteristics over operating range
• Rail-to-rail switching 0 - 5V
• Bidirectional dataflow with near-zero delay: no added ground
bounce
• Excellent RON matching between channels
• VCC operation: 2.3V to 3.6V
TheQS3VH251ischaracterizedforoperationfrom-40°Cto+85°C.
• High bandwidth - up to 500MHz
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low Demux capacitance, 4pF typical
• Available in QSOP and TSSOP packages
APPLICATIONS:
• Hot-swapping
• Multiplexing/demultiplexing
• Low distortion analog switch
• Replaces mechanical relay
• ATM 25/155 switching
FUNCTIONALBLOCKDIAGRAM
S0
S1
S2
E
I0
I1
I2
I3
I4
I5
I6
I7
Y
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
AUGUST 2002
1
c
2002 Integrated Device Technology, Inc.
DSC-5944/7
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
ABSOLUTEMAXIMUMRATINGS(1)
PINCONFIGURATION
Symbol
Description
SupplyVoltage to Ground
Max
–0.5 to +4.6
–0.5 to +5.5
–0.5 to +5.5
–3
Unit
V
(2)
VTERM
(3)
VTERM
DC Switch Voltage VS
V
(3)
VTERM
DC Input Voltage VIN
V
I3
VCC
1
2
3
4
5
6
16
15
14
13
VAC
IOUT
AC Input Voltage (pulse width ≤20ns)
DC Output Current (max. sink current/pin)
Storage Temperature
V
120
mA
°C
I4
I5
I2
I1
TSTG
–65 to +150
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
I6
I0
I7
12
11
10
9
Y
2. VCC terminals.
3. All terminals except VCC .
S0
NC
S1
S2
E
GND
7
8
CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT = 0V)
Symbol
CIN
Parameter(1)
Control Inputs
Typ.
3
Max. Unit
5
6
pF
pF
CI/O
Quickswitch Channels
(Switch OFF)
Demux
Mux
4
19
20
20
25
28
28
QSOP/ TSSOP
TOP VIEW
CI/O
Quickswitch Channels
(Switch ON)
Demux
Mux
pF
NOTE:
1. This parameter is guaranteed but not production tested.
FUNCTIONTABLE(1)
Select
PINDESCRIPTION
E
H
L
L
L
L
L
L
L
S2
X
L
S1
X
L
S0
X
L
Y
Z
Function
Pin Names
I/O
Description
Data Inputs
Disable
I0 - I7
S0 - S2
E
I
I
I0
I1
I2
I3
I4
I5
I6
I7
S2 - S0 = 0
S2 - S0 = 1
S2 - S0 = 2
S2 - S0 = 3
S2 - S0 = 4
S2 - S0 = 5
S2 - S0 = 6
S2 - S0 = 7
Select Input
Enable Input
Data Outputs
I
L
L
H
L
Y
O
L
H
H
L
L
H
L
H
H
H
H
L
H
L
H
H
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedence
2
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 3.3V ±0.3V
Symbol
Parameter
Input HIGH Voltage
Test Conditions
Min.
1.7
2
Typ.(1) Max.
Unit
VIH
GuaranteedLogicHIGH
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
—
—
—
—
—
—
—
6
—
—
0.7
0.8
±1
±1
±1
8
V
forControlInputs
GuaranteedLogicLOW
forControlInputs
0V ≤ VIN ≤ VCC
VIL
InputLOWVoltage
—
—
—
—
—
—
—
—
—
V
IIN
IOZ
InputLeakageCurrent(ControlInputs)
Off-StateCurrent(Hi-Z)
µA
µA
µA
0V ≤ VOUT ≤ 5V, Switches OFF
VIN or VOUT 0V to 5V, VCC = 0V
VCC = 2.3V
IOFF
DataInput/OutputPowerOffLeakage
VIN = 0V
ION = 30mA
ION = 15mA
ION = 30mA
ION = 15mA
RON
Switch ON Resistance
Typical at VCC = 2.5V
VCC = 3V
VIN = 1.7V
VIN = 0V
7
9
Ω
4
6
VIN = 2.4V
5
8
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C.
IN
CC
TYPICAL ON RESISTANCE vs V AT V = 3.3V
16
14
12
RON
(ohms)
10
8
6
4
2
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1.0
0.0
0.5
VIN
(Volts)
3
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
POWERSUPPLYCHARACTERISTICS
Symbol
ICCQ
Parameter
TestConditions(1)
Min.
—
Typ.
1
Max.
4
Unit
mA
µA
Quiescent Power Supply Current
Power Supply Current (2,3) per Input HIGH
Dynamic Power Supply Current(4)
VCC = Max., VIN = GND or VCC, f = 0
VCC = Max., VIN = 3V, f = 0 per Control Input
VCC = 3.3V, A and B Pins Open, Control Inputs
Toggling @ 50% Duty Cycle
∆ICC
—
—
30
ICCD
See Typical ICCD vs Enable Frequency graph below
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per input driven at the specified level. Mux/demux pins do not contribute to ∆Icc.
3. This parameter is guaranteed but not tested.
4. This parameter represents the current required to switch internal capacitance at the specified frequency. The mux/demux inputs do not contribute to the Dynamic Power Supply
Current. This parameter is guaranteed but not production tested.
CCD
CC
TYPICAL I
vs ENABLE FREQUENCY CURVE AT V = 3.3V
6
4
2
0
0
2
4
6
8
10
12
14
16
18
20
ENABLE FREQUENCY (MHz)
4
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE
TA = -40°C to +85°C
VCC = 2.5 ± 0.2V (1)
VCC = 3.3 ± 0.3V (1)
(4)
(4)
Symbol
tPLH
tPHL
Parameter
Min.
Max.
Min.
Max.
Unit
DataPropagationDelay(2,3)
Y to Ix or Ix to Y
SelectTime
Sx to Y
EnableTime
S to Ix
⎯
1.5
1.5
1.5
1.5
1.5
⎯
0.2
⎯
0.2
ns
tSEL
9
1.5
1.5
1.5
1.5
1.5
8
9
8
8
8
ns
ns
ns
ns
ns
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
9
DisableTime
S to Ix
EnableTime
E to Y or Ix
DisableTime
E to Y or Ix
8
9
8
fEorSx
OperatingFrequency-Enable(2,5)
10
⎯
20
MHz
NOTES:
1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS.
2. This parameter is guaranteed but not production tested.
3. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone
is of the order of 0.2ns at CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the
system. Propagation delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on
the driven side.
4. Minimums are guaranteed but not production tested.
5. Maximum toggle frequency for Sx or E control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
SOMEAPPLICATIONSFORHOTSWITCHPRODUCTS
Rail-to-Rail Switching
Multiplexing/Demultiplexing
Hot-Swapping
6
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
TESTCIRCUITSANDWAVEFORMS
TESTCONDITIONS
VIH
VT
SAME PHASE
INPUT TRANSITION
Symbol
VLOAD
VIH
VCC(1)= 3.3V ± 0.3V
VCC(2)= 2.5V ± 0.2V
Unit
0V
tPHL
tPHL
tPLH
tPLH
6
2 x Vcc
Vcc
V
VOH
VT
VOL
OUTPUT
3
V
VT
1.5
300
300
50
VCC/2
150
V
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
VLZ
mV
mV
pF
VHZ
150
CL
30
Propagation Delay
VLOAD
Open
GND
VCC
DISABLE
tPLZ
ENABLE
VIH
CONTROL
INPUT
VT
0V
500Ω
tPZL
VIN
VOUT
Pulse(1, 2)
VLOAD/2
VT
D.U.T.
VLOAD/2
OUTPUT
NORMALLY
LOW
Generator
SWITCH
CLOSED
VOL + VLZ
VOL
500Ω
tPHZ
RT
tPZH
CL
VOH
VOH -VHZ
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
VT
0V
0V
Test Circuits for All Outputs
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.
SWITCHPOSITION
Test
tPLZ/tPZL
tPHZ/tPZH
tPD
Switch
VLOAD
GND
Open
7
IDTQS3VH251
INDUSTRIALTEMPERATURERANGE
2.5V/3.3VQUAD8:1MUX/DEMUXHIGHBANDWIDTHBUSSWITCH
ORDERINGINFORMATION
XXXXX
XX
IDTQS
Package
Device Type
Q
Quarter Size Outline Package
QG
PA
QSOP - Green
Thin Shrink Small Outline Package
2.5V / 3.3V 8:1 Mux/Demux High Bandwidth Bus Switch
3VH251
DATASHEETDOCUMENTHISTORY
8/6/2002 Updated according to PCN Logic-0206-11
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logichelp@idt.com
(408) 654-6459
8
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